A theory of divine ideas was the standard Scholastic response to the question how does God know and produce the world? A theory was deemed to be successful only if it simultaneously upheld that God has perfect knowledge and that he is supremely simple and one. In articulating a theory of divine ideas, Carl Vater answers two sorts of questions. First, what is an idea? Does God have ideas? Are there many divine ideas? What sort of existence does an idea enjoy? Second, he answers questions about the scope of divine ideas: does God have ideas of individuals, species, genera, accidents, matter, evil, etc.? How many divine ideas are there? These questions cause the Scholastic authors to articulate clearly, among other things, their positions on the nature of knowledge, relation, exemplar causality, participation, infinity, and possibility. An author’s theory of divine ideas, then, is the locus for him to test the coherence of his metaphysical, epistemological, and logical principles. Many of the debates over divine ideas have their roots in disagreements over whether a given theory adequately articulates one of the underlying positions or the overall coherence of those positions. Peter John Olivi, for example, argues that his predecessors’ theories of knowledge and theories of relations are at odds, and this critique results in a major shift in theories of divine ideas. God's Knowledge of the World examines theories of divine ideas from approximately 1250–1325 AD (St. Bonaventure through Ockham). It will be the only work dedicated to categorizing and comparing the major theories of divine ideas in the Scholastic period.

In Good and Evil Actions, Steven J. Jensen navigates a path through the debate, retrieving what is of value from each interpretation

The contributors to Grace for Grace focus on the debates on grace and free will inspired by Augustine's later teachings on grace and the various reactions to it. In both popular and scholarly literature, the conflict has been traditionally referred to as the "Semi-Pelagian Controversy." For several decades, scholars have distanced themselves from that overly-simplistic and inaccurate portrayal. This book intends to solidify a disparate movement of scholarly thought and offer a secure basis for renewed study of the persons, texts, and events of this critical period in the reception of Augustine in the Early Middle Ages. This volume brings together new perspectives, based on fresh study of a wealth of primary sources, from an international team of scholars to explore the intra-church debates over grace and free will, after Augustine and Pelagius.

Grace, Predestination, and the Permission of Sin seeks to analyze a revisionist movement within Thomism in the 20th century over and against the traditional or classical Thomistic commentatorial treatment of physical premotion, grace, and the permission of sin, especially as these relate to the mysteries of predestination and reprobation. The over-arching critique leveled by the revisionists against the classic treatment is that Bañezian scholasticism had disregarded the dissymmetry between the line of good (God's causation of salutary acts) and the line of evil (God's permission of defect and sin). The teaching of St. Thomas is explored via intimate consideration of his texts. The thought of St. Thomas is then compared with the work of Domingo Bañez and the foremost 'Bañezian' of the 20th century, Reginald Garrigou-Lagrange. The work then shifts to a consideration of the major players of the revisionist treatment, including Francisco Marín-Sola, Jacques Maritain, and Bernard Lonergan. Jean-Herve Nicolas is also taken up as one who had held both accounts during his lifetime. The work analyzes and critiques the revisionist theories according to the fundamental tenets of the classical account. Upon final analysis, it seeks to show that the classical account sufficiently distances God's causal role in regard to free salutary acts and His non-causal role in regard to free sinful acts. Moreover, the revisionist account presents significant metaphysical problems and challenges major tenets of classical theism, such as the divine omnipotence, simplicity, and the exhaustive nature of divine providence. Finally, the implications of the traditional view are considered in light of the spiritual life. It is argued that the classical account is the only one which provides an adequate theological foundation for the Church's robust mystical and spiritual tradition, and in particular, the abandonment to divine providence.

Gratian the Theologian shows how one of the best-known canonists of the medieval period was also an accomplished theologian. Well into the twelfth century, compilations of Church law often dealt with theological issues. Gratian's Concordia discordantium canonum or Decretum, which was originally compiled around 1140, was no exception, and so Wei claims in this provocative book. The Decretum is the fundamental canon law work of the twelfth century, which served as both the standard textbook of canon law in the medieval schools and an authoritative law book in ecclesiastical and secular courts. Yet theology features prominently throughout the Decretum, both for its own sake and for its connection to canon law and canonistic jurisprudence.

Gratian's Decretum is one of the major works in European history, a text that in many ways launched the field of canon law. In this new volume, Atria Larson presents to students and scholars alike a critical edition of De penitentia (Decretum C.33 q.3), the foundational text on penance, both for canon law and for theology, of the twelfth century. This edition takes into account recent manuscript discoveries and research into the various recensions of Gratian's text and proposes a model for how a future critical edition of the entire Decretum could be formatted by offering a facing-page English translation. This translation is the first of this section of Gratian's De penitentia into any modern language and makes the text accessible to a wider audience. Both the Latin and the English text are presented in a way to make clear the development of Gratian's text in various stages within two main recensions. The edition and translation are preceded by an introduction relating the latest scholarship on Gratian and his text and are followed by three appendices, including one that provides a transcription of the relevant text from the debated manuscript Sankt Gallen, Stiftsbibliothek 673, and one that lists possible formal sources and related contemporary texts. This book provides a full edition and translation of the text studied in depth in Master of Penance: Gratian and the Development of Penitential Thought and Law in the Twelfth Century (CUA Press, 2014) by the same author.